com.varra.util.WrapperUtils Maven / Gradle / Ivy
/*
* utils4j - WrapperUtils.java, Aug 16, 2015 5:22:15 PM
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.varra.util;
import static com.varra.util.ObjectUtils.*;
import com.varra.classification.InterfaceAudience;
import com.varra.classification.InterfaceStability;
/**
* Utility methods required for wrapper classes.
*
* @author Rajakrishna V.
* Reddy
* @version 1.0
* @since 3.0
*/
@InterfaceAudience.Public
@InterfaceStability.Stable
@SuppressWarnings("unchecked")
public final class WrapperUtils
{
/**
* Converts the value to the specified object type provided and returns,
* else returns the default value provided.
*
* @param
* the generic type
* @param value
* the value
* @param defValue
* the default value
* @return the property
*/
public static T to(final Object value, final T defValue)
{
try
{
if (isNotNull(value) && isNotNull(defValue))
{
if (defValue instanceof Boolean)
{
return (T) (isNull(value) ? defValue : Boolean.parseBoolean(value.toString()));
}
else if (defValue instanceof Byte)
{
return (T) (isNull(value) ? defValue : Byte.parseByte(value.toString()));
}
else if (defValue instanceof Short)
{
return (T) (isNull(value) ? defValue : Short.parseShort(value.toString()));
}
else if (defValue instanceof Integer)
{
return (T) (isNull(value) ? defValue : Integer.parseInt(value.toString()));
}
else if (defValue instanceof Long)
{
return (T) (isNull(value) ? defValue : Long.parseLong(value.toString()));
}
else if (defValue instanceof Float)
{
return (T) (isNull(value) ? defValue : Float.parseFloat(value.toString()));
}
else if (defValue instanceof Double)
{
return (T) (isNull(value) ? defValue : Double.parseDouble(value.toString()));
}
else if (defValue instanceof String)
{
return (T) (isNull(value) ? defValue : value.toString());
}
}
}
catch (Exception e)
{
// What should I do .. !!!
}
return defValue;
}
/**
* Converts the value to the specified object type provided and returns,
* else returns the default value provided.
*
* @param
* the generic type
* @param value
* the value
* @param defValue
* the default value
* @return the property
*/
public static T to(final String value, final T defValue)
{
try
{
if (isNotNull(value) && isNotNull(defValue))
{
if (defValue instanceof Boolean)
{
return (T) (isNull(value) ? defValue : Boolean.parseBoolean(value.toString()));
}
else if (defValue instanceof Byte)
{
return (T) (isNull(value) ? defValue : Byte.parseByte(value.toString()));
}
else if (defValue instanceof Short)
{
return (T) (isNull(value) ? defValue : Short.parseShort(value.toString()));
}
else if (defValue instanceof Integer)
{
return (T) (isNull(value) ? defValue : Integer.parseInt(value.toString()));
}
else if (defValue instanceof Long)
{
return (T) (isNull(value) ? defValue : Long.parseLong(value.toString()));
}
else if (defValue instanceof Float)
{
return (T) (isNull(value) ? defValue : Float.parseFloat(value.toString()));
}
else if (defValue instanceof Double)
{
return (T) (isNull(value) ? defValue : Double.parseDouble(value.toString()));
}
else if (defValue instanceof String)
{
return (T) (isNull(value) ? defValue : value.toString());
}
}
}
catch (Exception e)
{
// What should I do .. !!!
}
return defValue;
}
/**
* Converts the value to the specified object type provided and returns,
* else returns the default value provided.
*
* @param
* the generic type
* @param value
* the value
* @param klass
* the klass
* @return the property
*/
public static T to(final String value, Class klass)
{
try
{
Object newValue = value;
if (klass.isPrimitive())
{
klass = getClassFromPrimitive(klass);
}
if (isNotNull(newValue))
{
if (Boolean.class.isAssignableFrom(klass))
{
return (T) (newValue = Boolean.parseBoolean(value.toString()));
}
else if (Byte.class.isAssignableFrom(klass))
{
return (T) (newValue = Byte.parseByte(value.toString()));
}
else if (Short.class.isAssignableFrom(klass))
{
return (T) (newValue = Short.parseShort(value.toString()));
}
else if (Integer.class.isAssignableFrom(klass))
{
return (T) (newValue = Integer.parseInt(value.toString()));
}
else if (Long.class.isAssignableFrom(klass))
{
return (T) (newValue = Long.parseLong(value.toString()));
}
else if (Float.class.isAssignableFrom(klass))
{
return (T) (newValue = Float.parseFloat(value.toString()));
}
else if (Double.class.isAssignableFrom(klass))
{
return (T) (newValue = Double.parseDouble(value.toString()));
}
else if (String.class.isAssignableFrom(klass))
{
return (T) (newValue = value.toString());
}
}
}
catch (Exception e)
{
// What should I do .. !!!
}
return null;
}
/**
* Gets the class of the specified type.
*
* @param
* the generic type
* @param type
* the type
* @return the class
*/
public static Class getClass(T type)
{
return (Class) type.getClass();
}
/**
* Gets the class of the specified type.
*
* @param
* the generic type
* @param type
* the type
* @return the class
*/
public static Class getClassFromPrimitive(Class type)
{
if (type.getName().equalsIgnoreCase("boolean"))
{
return (Class) Boolean.class;
}
else if (type.getName().equalsIgnoreCase("int"))
{
return (Class) Integer.class;
}
else if (type.getName().equalsIgnoreCase("long"))
{
return (Class) Long.class;
}
else if (type.getName().equalsIgnoreCase("short"))
{
return (Class) Short.class;
}
else if (type.getName().equalsIgnoreCase("float"))
{
return (Class) Float.class;
}
else if (type.getName().equalsIgnoreCase("double"))
{
return (Class) Double.class;
}
else if (type.getName().equalsIgnoreCase("string"))
{
return (Class) String.class;
}
else if (type.getName().equalsIgnoreCase("char"))
{
return (Class) Character.class;
}
else if (type.getName().equalsIgnoreCase("byte"))
{
return (Class) Byte.class;
}
return type;
}
}